乙酰胆碱酯酶
外观
乙酰胆碱酯酶 | |||||||
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识别码 | |||||||
EC編號 | 3.1.1.7 | ||||||
CAS号 | 9000-81-1 | ||||||
数据库 | |||||||
IntEnz | IntEnz浏览 | ||||||
BRENDA | BRENDA入口 | ||||||
ExPASy | NiceZyme浏览 | ||||||
KEGG | KEGG入口 | ||||||
MetaCyc | 代谢路径 | ||||||
PRIAM | 概述 | ||||||
PDB | RCSB PDB PDBj PDBe PDBsum | ||||||
基因本体 | AmiGO / EGO | ||||||
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乙酰胆碱酯酶(acetylcholinesterase,AChE,AChase),EC 3.1.1.7,是催化神经递质乙酰胆碱降解(通过其水解活性)成胆碱和乙酸的酶;属于一种水解酶或丝氨酸蛋白酶或羧酸酯酶家族[1]。
此酶主要存在于胆碱能神经元、神经肌肉接头处、肌肉组织等,具终止乙酰胆碱对突触后膜兴奋作用,恢复突触后膜极化,可终止突触传递。
乙酰胆碱酯酶具有极高的水解活性——一分子的乙酰胆碱酯酶每秒钟可以水解25000分子的乙酰胆碱。经乙酰胆碱酯酶作用而产生的胆碱被重新利用——通过再攝取被转运进入神经末梢,在那里被重新利用以合成新的乙酰胆碱分子[2]。
参考文献
[编辑]- ^ 乙酰胆碱酯酶. 术语在线. 全国科学技术名词审定委员会. (简体中文)
- ^ Dale Purves, George J. Augustine, David Fitzpatrick, William C. Hall, Anthony-Samuel LaMantia, James O. McNamara, and Leonard E. White. Neuroscience. 4th ed.. Sinauer Associates. 2008: 121–2. ISBN 978-0-87893-697-7.
延伸阅读
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- Shafferman A, Kronman C, Flashner Y; et al. Mutagenesis of human acetylcholinesterase. Identification of residues involved in catalytic activity and in polypeptide folding. J. Biol. Chem. 1992, 267 (25): 17640–8. PMID 1517212.
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- Lapidot-Lifson Y, Prody CA, Ginzberg D et al. Coamplification of human acetylcholinesterase and butyrylcholinesterase genes in blood cells: correlation with various leukemias and abnormal megakaryocytopoiesis.. Proc. Natl. Acad. Sci. U.S.A. 1989, 86 (12): 4715–9. PMC 287342 . PMID 2734315. doi:10.1073/pnas.86.12.4715.
- Bazelyansky M, Robey E, Kirsch JF. Fractional diffusion-limited component of reactions catalyzed by acetylcholinesterase. Biochemistry. 1986, 25 (1): 125–30. PMID 3954986. doi:10.1021/bi00349a019.
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- Ordentlich A, Barak D, Kronman C et al. Contribution of aromatic moieties of tyrosine 133 and of the anionic subsite tryptophan 86 to catalytic efficiency and allosteric modulation of acetylcholinesterase. J. Biol. Chem. 1995, 270 (5): 2082–91. PMID 7836436. doi:10.1074/jbc.270.5.2082.
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外部链接
[编辑]- ATSDR Case Studies in Environmental Medicine: Cholinesterase Inhibitors, Including Insecticides and Chemical Warfare Nerve Agents(页面存档备份,存于互联网档案馆) U.S. Department of Health and Human Services
- Proteopedia Acetylcholinesterase
- Proteopedia AChE_inhibitors_and_substrates
- Proteopedia AChE_inhibitors_and_substrates_(Part_II)
- Proteopedia AChE bivalent inhibitors AChE_bivalent_inhibitors AChE bivalent inhibitors